This disclosure provides systems, methods, and devices for wireless communication that support network controlled repeater operation at new radio—unlicensed (NRU) bands. The network controlled repeater operations include receipt of a scheduling message from a serving base station that identifies an amplify and forward (AF) window and an offset prior to a beginning of the AF window. The relay node performs a listen before talk (LBT) procedure on a shared communication channel within the offset. In response to the result of the LBT, the relay node either refrains from AF operations within the AF window in response to failure of the LBT procedure or performs the AF operations on all received signals during the AF window in response to success of the LBT procedure. Other aspects and features are also claimed and described.

A millimeter-wave repeater may be provided to cover a radio shaded area, in a system for the millimeter-wave repeater. The millimeter-wave repeater may provide a service by changing a signal of a millimeter-wave band to an intermediate frequency band, and then changing the signal to the millimeter-wave band again.

A user device cradle can include a receiver configured to removably retain a wireless user device. One or more Radio Frequency (RF) signal couplers and one or more power couplers can be disposed in the receiver of the cradle. The one or more RF signal couplers can be configured to couple one or more RF communication signals to the wireless user device, while the one or more power couplers can be configured to couple power to the wireless user device. The coupling of power to the user device can be reduced or minimized when a downlink signal is received by a user device in the user device cradle, or when the user device cradle is in a weak signal area.

Radio frequency signal boosters are provided herein. In certain embodiments, a signal booster system includes a signal booster that is proximately located to an outdoor base station antenna. Implementing the signal booster system in this manner can provide a number of advantages relative to a configuration in which the signal booster is far from a base station antenna. For example, a long cable connected from an indoor signal booster to an outdoor base station antenna can be several meters long, resulting in significant cable loss that degrades transmit power and/or receiver sensitivity.

A network environment includes a repeater wireless station. The repeater wireless station receives a first wireless signal from a wireless base station. The repeater wireless station transmits a second wireless signal from the repeater wireless station. The second wireless signal is a reproduction of the first wireless signal. When transmitting the second wireless signal, the repeater wireless station controls a phase shift of the second wireless signal with respect to a timing of the received first wireless signal to reduce wireless interference in the network environment.

The application discloses a method applied in a system. The method includes the following operations: determining a first statistics of a first signal and a second statistics of a second signal according to a power split ratio and a noise level of a relay node; relaying, by the relay node, the first signal according to the power split ratio, the first statistics and the second statistics to generate the second signal; and receiving, by a destination node, the second signal.

The present disclosure provides an apparatus for setting a gain of a RF repeater includes: a synchronization signal power calculator configured to determine an average received power level of a synchronization signal received over a predetermined number of times as a synchronization signal power; a downlink power calculator configured to calculate a downlink input power according to a power ratio of synchronization signal to data channel signal based on the synchronization signal power; and a downlink gain setting unit configured to calculate a downlink gain by subtracting the downlink input power from a downlink output power determined by hardware specifications to set the downlink gain.

Radio frequency signal boosters serving as outdoor cellular infrastructure are provided. In certain embodiments, a signal booster system for a high frequency cellular network includes a parabolic base station antenna configured to receive a downlink signal of a frequency band higher than 20 gigahertz and to transmit an amplified uplink signal of the frequency band, booster circuitry configured to amplify an uplink signal to generate the amplified uplink signal and to amplify the downlink signal to generate an amplified downlink signal, and a mobile station antenna configured to receive the uplink signal and to transmit the amplified downlink signal.

A technology is described for a repeater. A repeater can comprise: a server port; a donor port; a first uplink (UL) filtering and amplification path coupled between the server port and the donor port, wherein the first UL filtering and amplification path is configured to filter an UL signal of a first frequency range; a first downlink (DL) filtering and amplification path coupled between the server port and the donor port, wherein the first DL filtering and amplification path is configured to filter a DL signal of the first frequency range; and a second DL filtering and amplification path coupled between the server port and the donor port, wherein the second DL filtering and amplification path is configured to filter a DL signal of a second frequency range.

Technology for a multi-repeater system including wireless transmission of power from a first repeater to a second repeater is disclosed. A first and second repeater can be disposed opposite each other about a structural element. Wireless power can be transmitted from the first repeater through the structural element to the second repeater for use by the second repeater.